JP7225700B2 - motor and blower - Google Patents

motor and blower Download PDF

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Publication number
JP7225700B2
JP7225700B2 JP2018209805A JP2018209805A JP7225700B2 JP 7225700 B2 JP7225700 B2 JP 7225700B2 JP 2018209805 A JP2018209805 A JP 2018209805A JP 2018209805 A JP2018209805 A JP 2018209805A JP 7225700 B2 JP7225700 B2 JP 7225700B2
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Prior art keywords
circuit board
stator
wall portion
bearing housing
insulator
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JP2018209805A
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JP2020078165A (en
Inventor
秀彦 日▲高▼
裕司 才木
智之 田中
寛弘 高口
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Nidec America Corp
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Nidec America Corp
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Priority to JP2018209805A priority Critical patent/JP7225700B2/en
Priority to CN201921693960.5U priority patent/CN210867370U/en
Priority to US16/656,885 priority patent/US11121600B2/en
Publication of JP2020078165A publication Critical patent/JP2020078165A/en
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Publication of JP7225700B2 publication Critical patent/JP7225700B2/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/46Fastening of windings on the stator or rotor structure
    • H02K3/52Fastening salient pole windings or connections thereto
    • H02K3/521Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/06Units comprising pumps and their driving means the pump being electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F04D25/0633Details of the magnetic circuit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F04D25/0646Details of the stator
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/18Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K11/00Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30Structural association with control circuits or drive circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/165Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • H02K5/1675Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at only one end of the rotor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/24Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08Structural association with bearings
    • H02K7/086Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2203/00Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/03Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2203/00Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/06Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2203/00Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/12Machines characterised by the bobbins for supporting the windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Motor Or Generator Frames (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Description

本発明は、モータ及び送風機に関する。 The present invention relates to motors and blowers.

従来のモータは、特許文献1に開示されている。このモータは、ティースコア(ステータコア)と、巻線ボビン(インシュレータ)と、巻線と、プリント基板(回路基板)と、を備える。巻線ボビンは、ティースコアのティース部に嵌められる。巻線は、巻線ボビンを介してティース部に巻回され、プリント基板に接続される。 A conventional motor is disclosed in US Pat. This motor includes a tooth core (stator core), a winding bobbin (insulator), windings, and a printed board (circuit board). The winding bobbin is fitted to the tooth portion of the tooth core. The windings are wound around the teeth via winding bobbins and connected to the printed circuit board.

ティースコアの中央部にはモータ軸を形成するシャフトの挿通孔が、設けられる。プリント基板は、中央部にシャフトの支持部材が、挿入される挿入孔を有し、挿入孔の径方向外方において、巻線ボビンの上端部と接触する。 An insertion hole for a shaft forming a motor shaft is provided in the central portion of the tea core. The printed circuit board has an insertion hole in the central portion into which the support member for the shaft is inserted, and is in contact with the upper end of the winding bobbin outside the insertion hole in the radial direction.

特開2001-327109号公報JP-A-2001-327109

通常、シャフトは、支持部材に保持される軸受により支持され、支持部材はティースコアの挿通孔に圧入される。また、プリント基板上面の回路には、防湿等のためにコーティング剤が塗布される場合がある。 Normally, the shaft is supported by a bearing held by a support member, and the support member is press-fitted into the insertion hole of the tooth core. In addition, a coating agent may be applied to the circuits on the upper surface of the printed circuit board to prevent moisture.

このとき、上記特許文献1に開示されたモータによると、コーティング剤をプリント基板へ塗布する際に、コーティング剤が挿入孔を介してティースコアの径方向内面に流入する虞がある。このため、ティースコアの径方向内面に支持部材を固定する際に、コーティング剤の付着により、シャフトの傾斜または偏心によってモータ軸の位置精度が悪化する虞がある。 At this time, according to the motor disclosed in Patent Literature 1, when the coating agent is applied to the printed circuit board, the coating agent may flow into the radial inner surface of the tea core through the insertion hole. Therefore, when the support member is fixed to the radially inner surface of the tea core, the positional accuracy of the motor shaft may deteriorate due to the inclination or eccentricity of the shaft due to adhesion of the coating agent.

本発明は、回路基板からステータコアの径方向内面へのコーティング剤の流入を抑制し、モータ軸の位置精度を向上するモータ及びそれを備えた送風機を提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a motor and an air blower having the same that suppresses the inflow of a coating agent from a circuit board to the radial inner surface of a stator core and improves the positional accuracy of the motor shaft.

本発明の例示的なモータは、静止部と、回転部と、軸受部と、を備える。回転部は、上下に延びる中心軸を中心として回転するシャフトを有する。軸受部は、静止部に対してシャフトを回転可能に支持する。静止部は、軸受ハウジングと、ステータと、回路基板と、を備える。軸受ハウジングは、軸受部を保持する筒状である。ステータは、軸受ハウジングの径方向外方に配置される。回路基板は、ステータの上方に配置され、軸受ハウジングを挿入する挿入孔を有する。ステータは、ステータコアと、インシュレータと、コイルと、端子ピンと、を備える。ステータコアは、環状のコアバックと、コアバックから径方向外方に延びて周方向に複数配置されるティースと、を有する。インシュレータは、ステータコアの少なくとも一部を覆う。コイルは、ティースの周囲にインシュレータを介して導線を巻回される。端子ピンは、導線と接続され、回路基板に形成された貫通孔を貫通して回路基板よりも上方に突出し、回路基板にコーティング層で被覆された半田部を介して接続される。インシュレータは、基台部と、壁部と、を有する。基台部は、ステータコアの上方の少なくとも一部を覆う。壁部は、基台部から上方に突出し、軸受ハウジングの径方向外方に配置され、挿入孔において回路基板の径方向内面に接触する。壁部は、半田部と径方向に対向する。壁部の周方向の幅は、半田部の周方向の幅よりも大きい。壁部の上端は、回路基板の上面よりも軸方向上方に位置する。 An exemplary motor of the present invention comprises a stationary portion, a rotating portion, and a bearing portion. The rotating part has a shaft that rotates around a vertically extending central axis. The bearing portion rotatably supports the shaft with respect to the stationary portion. The stationary portion includes a bearing housing, a stator, and a circuit board. The bearing housing has a cylindrical shape that holds the bearing portion. The stator is arranged radially outwardly of the bearing housing. The circuit board is arranged above the stator and has an insertion hole into which the bearing housing is inserted. The stator includes a stator core, insulators, coils, and terminal pins. The stator core has an annular core back and a plurality of teeth extending radially outward from the core back and arranged in a circumferential direction. The insulator covers at least part of the stator core. The coil is wound with a conductive wire around the teeth via an insulator. The terminal pin is connected to the conductor, passes through a through hole formed in the circuit board, protrudes above the circuit board, and is connected to the circuit board via a solder portion covered with a coating layer. The insulator has a base portion and a wall portion. The base part covers at least part of the upper part of the stator core. The wall portion protrudes upward from the base portion, is arranged radially outward of the bearing housing, and contacts the radial inner surface of the circuit board at the insertion hole. The wall portion radially faces the solder portion. The circumferential width of the wall portion is greater than the circumferential width of the solder portion. The upper end of the wall portion is positioned axially above the upper surface of the circuit board.

例示的な本発明によれば、回路基板からステータコアの径方向内面へのコーティング剤の流入を抑制し、モータ軸の位置精度を向上するモータ及び送風機を提供することができる。 According to the exemplary invention, it is possible to provide a motor and a blower that suppress the inflow of a coating agent from the circuit board to the radial inner surface of the stator core and improve the positional accuracy of the motor shaft.

図1は、本発明の第1実施形態に係る送風機の分解斜視図である。FIG. 1 is an exploded perspective view of a blower according to a first embodiment of the invention. 図2は、本発明の第1実施形態に係るモータの縦断面図である。FIG. 2 is a longitudinal sectional view of the motor according to the first embodiment of the invention. 図3は、本発明の第1実施形態に係るモータの静止部の斜視図である。FIG. 3 is a perspective view of a stationary portion of the motor according to the first embodiment of the invention. 図4は、本発明の第1実施形態に係るモータのステータの斜視図である。FIG. 4 is a perspective view of the stator of the motor according to the first embodiment of the invention. 図5は、本発明の第1実施形態に係るモータのステータの分解斜視図である。FIG. 5 is an exploded perspective view of the stator of the motor according to the first embodiment of the invention. 図6は、本発明の第1実施形態に係るモータの端子ピン近傍を概略的に示す縦断面図である。FIG. 6 is a longitudinal sectional view schematically showing the vicinity of terminal pins of the motor according to the first embodiment of the present invention. 図7は、本発明の第1実施形態に係るモータの軸受ハウジングを下方から視た斜視図である。FIG. 7 is a bottom perspective view of the bearing housing of the motor according to the first embodiment of the present invention. 図8は、本発明の第2実施形態に係るモータの静止部の斜視図である。FIG. 8 is a perspective view of a stationary portion of a motor according to a second embodiment of the invention.

以下、本願の例示的な実施形態について、図面を参照しながら説明する。なお、本願では、モータの中心軸と平行な方向を「軸方向」、モータの中心軸に直交する方向を「径方向」、モータの中心軸を中心とする円弧に沿う方向を「周方向」、とそれぞれ称する。また、本願では、軸方向を上下方向とし、ステータコアに対して回路基板側を上として、各部の形状や位置関係を説明する。なお、上下方向は、単に説明のための用いられる名称であって、実際の位置関係及び方向を限定しない。 Exemplary embodiments of the present application are described below with reference to the drawings. In the present application, the direction parallel to the central axis of the motor is referred to as "axial direction", the direction perpendicular to the central axis of the motor is referred to as "radial direction", and the direction along the arc around the central axis of the motor is referred to as "circumferential direction". , respectively. In addition, in the present application, the shape and positional relationship of each part will be described with the axial direction being the vertical direction and the circuit board side of the stator core being the top. Note that the vertical direction is merely a name used for explanation, and does not limit the actual positional relationship and direction.

また、本願において「平行な方向」とは、略平行な方向も含む。また、本願において「直交する方向」とは、略直交する方向も含む。 Further, in the present application, the term “parallel direction” includes substantially parallel directions. In addition, in the present application, the term “perpendicular direction” includes a substantially perpendicular direction.

<第1実施形態>
(1.送風機の構成)
本発明の例示的な一実施形態の送風機について説明する。図1は、本発明の実施形態に係る送風機100の分解斜視図であり、図2は、送風機100のモータ1の縦断面斜視図である。図3は、静止部40の斜視図であり、軸受ハウジング61が、ステータ50に固定される前の状態を示す。
<First Embodiment>
(1. Configuration of blower)
A blower according to an exemplary embodiment of the invention will now be described. FIG. 1 is an exploded perspective view of a fan 100 according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional perspective view of a motor 1 of the fan 100. As shown in FIG. FIG. 3 is a perspective view of stationary portion 40 showing a state before bearing housing 61 is fixed to stator 50 .

送風機100は、モータ1及びインペラ10を有する。インペラ10は、上面が開口する円筒状のカップ部11及び羽根12を有する。カップ部11及び羽根12は、樹脂により一体成形される。カップ部11は、内部に後述するロータホルダ31を収容し、モータ1に固定される。モータ1を駆動させると、インペラ10が、中心軸Cを中心として回転する。 A blower 100 has a motor 1 and an impeller 10 . The impeller 10 has a cylindrical cup portion 11 and blades 12 with an open upper surface. The cup portion 11 and the blades 12 are integrally molded from resin. The cup portion 11 accommodates a rotor holder 31 , which will be described later, and is fixed to the motor 1 . When the motor 1 is driven, the impeller 10 rotates around the central axis C. As shown in FIG.

(2.モータの構成)
モータ1は、静止部40と、回転部30と、軸受部80と、を備える。回転部30は、モータ軸を形成するシャフト32を有する。シャフト32は、上下に延びる中心軸Cを中心として回転する。軸受部80は、静止部40に対してシャフト32を回転可能に支持する。
(2. Configuration of motor)
The motor 1 includes a stationary portion 40 , a rotating portion 30 and a bearing portion 80 . The rotating part 30 has a shaft 32 forming a motor shaft. The shaft 32 rotates around a central axis C extending vertically. The bearing portion 80 rotatably supports the shaft 32 with respect to the stationary portion 40 .

静止部40は、軸受ハウジング61と、ステータ50と、回路基板63と、を備える。軸受ハウジング61は、軸受部80を保持し、筒状に形成される。ステータ50は、軸受ハウジング61の径方向外方に配置される。回路基板63は、ステータ50の上方に配置され、軸受ハウジング61を挿入、又は圧入する挿入孔63aを有する。 The stationary portion 40 includes a bearing housing 61 , a stator 50 and a circuit board 63 . The bearing housing 61 holds the bearing portion 80 and is formed in a tubular shape. The stator 50 is arranged radially outward of the bearing housing 61 . The circuit board 63 is arranged above the stator 50 and has an insertion hole 63a into which the bearing housing 61 is inserted or press-fitted.

ステータ50は、ステータコア51と、インシュレータ52、53と、コイル(不図示)と、端子ピン55と、を有する。 The stator 50 has a stator core 51 , insulators 52 and 53 , coils (not shown), and terminal pins 55 .

ステータコア51は、環状の積層鋼板から成る。ステータコア51は、コアバック51dと、ティース51eと、を有する。コアバック51dは、中心軸C上に挿通孔51aを有する環状に形成される。ティース51eは、コアバック51dから径方向外方に延びて周方向に複数配置される。例えば、本実施形態のティース51eの数は、6個である。 The stator core 51 is made of annular laminated steel plates. The stator core 51 has a core back 51d and teeth 51e. The core back 51d is formed in an annular shape having an insertion hole 51a on the central axis C. As shown in FIG. The teeth 51e extend radially outward from the core back 51d and are arranged in plurality in the circumferential direction. For example, the number of teeth 51e in this embodiment is six.

インシュレータ52、53は、絶縁性の樹脂成形品から成る。インシュレータ52は、ステータコア51の上方に配置され、インシュレータ53は、ステータコア51の下方に配置される。インシュレータ52、53は、ティース51eの上面、下面及び周方向側面を覆う(図5参照)。なお、インシュレータ52、53の詳細な構成については後述する。 The insulators 52 and 53 are made of insulating resin moldings. Insulator 52 is arranged above stator core 51 and insulator 53 is arranged below stator core 51 . The insulators 52 and 53 cover the upper surface, lower surface and circumferential side surfaces of the teeth 51e (see FIG. 5). A detailed configuration of the insulators 52 and 53 will be described later.

コイル(不図示)は、インシュレータ52の上方及びインシュレータ53の下方に導線(不図示)を巻回して形成される。インシュレータ52、53により、ステータコア51と導線とは絶縁される。 A coil (not shown) is formed by winding a conductive wire (not shown) above the insulator 52 and below the insulator 53 . The insulators 52 and 53 insulate the stator core 51 from the conducting wire.

端子ピン55は、隣接するティース51e間に配置され、例えば、6箇所設けられる。端子ピン55の下端部は、導線と接続される。端子ピン55の上端部は、回路基板63に形成された貫通孔63bを軸方向に貫通して回路基板63よりも上方に突出する。端子ピン55の上端部は、回路基板63に半田部64を介して接続される。半田部64は、コーティング剤によって、コーティング層65(図6参照)で被覆される。 The terminal pins 55 are arranged between the adjacent teeth 51e, and are provided at six locations, for example. A lower end portion of the terminal pin 55 is connected to a conducting wire. An upper end portion of the terminal pin 55 axially penetrates a through hole 63 b formed in the circuit board 63 and protrudes above the circuit board 63 . An upper end portion of the terminal pin 55 is connected to the circuit board 63 via the solder portion 64 . The solder portion 64 is coated with a coating layer 65 (see FIG. 6) using a coating agent.

回路基板63は、挿入孔63aと、貫通孔63bと、を有する。貫通孔63bは、挿入孔63aの径方向外方に配置され、6箇所設けられる。貫通孔63bは、周方向に等間隔に配置される。 The circuit board 63 has an insertion hole 63a and a through hole 63b. Six through-holes 63b are arranged radially outward of the insertion hole 63a. The through holes 63b are arranged at regular intervals in the circumferential direction.

軸受ハウジング61は、円筒状に形成され、挿入孔63aからステータ50の挿通孔51aに圧入される。軸受ハウジング61は、軸受部80を内部に保持する。軸受部80には、例えば、スリーブ軸受機構が用いられる。なお、軸受部80は、2つの玉軸受が用いられてもよい。 The bearing housing 61 is formed in a cylindrical shape and is press-fitted into the insertion hole 51a of the stator 50 through the insertion hole 63a. The bearing housing 61 holds the bearing portion 80 inside. A sleeve bearing mechanism, for example, is used for the bearing portion 80 . Note that two ball bearings may be used for the bearing portion 80 .

回転部30は、ロータホルダ31、シャフト32及びマグネット33を備える。シャフト32は、中心軸Cに沿って延びた回転軸を形成する柱状の金属部材であり、軸受ハウジング61内に挿通されて軸受部80により回転可能に支持される。 The rotating part 30 includes a rotor holder 31 , a shaft 32 and magnets 33 . The shaft 32 is a columnar metal member that forms a rotation axis extending along the central axis C, is inserted through the bearing housing 61 and is rotatably supported by the bearing portion 80 .

ロータホルダ31は、有蓋筒状であり、内周面にマグネット33が固定される。マグネット33は、ステータコア51の径方向外方に配置され、ステータ50とマグネット33との間でトルクが発生するため、モータ1が駆動する。 The rotor holder 31 has a lidded tubular shape, and a magnet 33 is fixed to its inner peripheral surface. The magnet 33 is arranged radially outward of the stator core 51 , and torque is generated between the stator 50 and the magnet 33 , so that the motor 1 is driven.

(3.インシュレータの構造)
図4は、ステータ50の斜視図であり、導線を省いて記載する。図5は、ステータ50の分解斜視図であり、導線及び端子ピン55を省いて記載する。図6は、端子ピン55近傍を概略的に示す縦断面図である。
(3. Structure of insulator)
FIG. 4 is a perspective view of the stator 50, omitting conductors. FIG. 5 is an exploded perspective view of the stator 50 with the conductors and terminal pins 55 omitted. FIG. 6 is a longitudinal sectional view schematically showing the vicinity of the terminal pin 55. As shown in FIG.

インシュレータ52は、基台部52aと、壁部52bと、を有する。基台部52aは、上面カバー部52cと、側面カバー部52dと、突起部52eと、端子案内部52hと、を有する。基台部52aは、ステータコア51の上面内縁部を避けてステータコア51の上面と軸方向に接触する。 The insulator 52 has a base portion 52a and a wall portion 52b. The base portion 52a has a top cover portion 52c, a side cover portion 52d, a projection portion 52e, and a terminal guide portion 52h. The base portion 52 a contacts the upper surface of the stator core 51 in the axial direction while avoiding the inner edge portion of the upper surface of the stator core 51 .

上面カバー部52cは、周方向に複数配置されて内周端を連結され、径方向に延びる。各上面カバー部52cは、各ティース51eの上面と接触する。側面カバー部52dは、上面カバー部52cの側縁部から下方に延びてティース51eの周方向側面と接触する。突起部52eは、各上面カバー部52cの上面外縁部から上方に突出する。突起部52eの上端部は、回路基板63の下面と接触して回路基板63を支持する。ただし、回路基板63は、突出部52eと接触していなくてもよい。 A plurality of upper surface cover portions 52c are arranged in the circumferential direction, are connected at their inner peripheral ends, and extend in the radial direction. Each top cover portion 52c contacts the top surface of each tooth 51e. The side cover portion 52d extends downward from the side edge portion of the upper surface cover portion 52c and contacts the circumferential side surfaces of the teeth 51e. The protruding portion 52e protrudes upward from the outer edge of the upper surface of each upper surface cover portion 52c. The upper end of the protrusion 52 e contacts the lower surface of the circuit board 63 to support the circuit board 63 . However, the circuit board 63 does not have to be in contact with the projecting portion 52e.

端子案内部52hは、軸方向に延びる円筒状に形成され、隣接する上面カバー部52cの間に配置される。また、端子案内部52hは、ティース51eの径方向の内端と外端との中央部よりも径方向内側に配置される。端子案内部52hは、端子ピン55が挿通し、端子ピン55の上端部は端子案内部52hの上端部よりも軸方向上方に突出する。端子案内部52hにより、端子ピン55とステータコア51とは絶縁される。 The terminal guide portion 52h is formed in a cylindrical shape extending in the axial direction, and is arranged between the adjacent upper surface cover portions 52c. In addition, the terminal guide portion 52h is arranged radially inward of the central portion between the radial inner end and the outer end of the tooth 51e. The terminal pin 55 is inserted through the terminal guide portion 52h, and the upper end portion of the terminal pin 55 protrudes axially above the upper end portion of the terminal guide portion 52h. The terminal pin 55 and the stator core 51 are insulated by the terminal guide portion 52h.

壁部52bは、基台部52aの上面内縁部から上方に突出する。軸受ハウジング61が、ステータ50に固定された状態において、壁部52bは、軸受ハウジング61の径方向外方に配置され、回路基板63の挿入孔63aにおける径方向内面と径方向に接触する。すなわち、インシュレータ52は、ステータコア51の上方の少なくとも一部を覆う基台部52aと、基台部52aから上方に突出し、軸受ハウジング61の径方向外方に配され、回路基板63の挿入孔63aにおける径方向内面に接触する壁部52bと、を有する。 The wall portion 52b protrudes upward from the inner edge portion of the upper surface of the base portion 52a. When the bearing housing 61 is fixed to the stator 50 , the wall portion 52 b is arranged radially outward of the bearing housing 61 and radially contacts the radial inner surface of the insertion hole 63 a of the circuit board 63 . That is, the insulator 52 includes a base portion 52 a that covers at least a portion of the upper portion of the stator core 51 , a base portion 52 a that protrudes upward from the base portion 52 a, is arranged radially outward of the bearing housing 61 , and is inserted into an insertion hole 63 a of the circuit board 63 . and a wall portion 52b that contacts the radially inner surface of the .

また、壁部52bは、軸方向下方に窪む切欠き部52gを有する。切欠き部52gは周方向に等間隔で、例えば、6箇所に配置される。これにより、壁部52bの上部が、周方向に6個に分割される。また、1箇所の切欠き部52g(以下、「切欠き部52f」という場合がある)は他の5箇所よりも周方向の幅が大きい。壁部52bは、挿入孔63aに挿入され、後述する回路基板63の基板凸部63cが切欠き部52fに係合する。 Further, the wall portion 52b has a notch portion 52g recessed downward in the axial direction. 52 g of notch parts are arrange|positioned at equal intervals in the circumferential direction, for example, at six places. As a result, the upper portion of the wall portion 52b is divided into six pieces in the circumferential direction. In addition, one notch portion 52g (hereinafter sometimes referred to as "notch portion 52f") has a larger width in the circumferential direction than the other five portions. The wall portion 52b is inserted into the insertion hole 63a, and a board protrusion 63c of the circuit board 63, which will be described later, engages with the notch portion 52f.

壁部52bの上部が、周方向に複数分割されており、壁部52bを径方向に撓ませる。このため、回路基板63を、壁部52bに係合する際の作業性が向上する。なお、分割された壁部52bの上部が、端子ピン55と同数であり、各壁部52bの周方向の幅を十分に確保できる。 The upper portion of the wall portion 52b is divided into a plurality of parts in the circumferential direction, and the wall portion 52b is flexed in the radial direction. Therefore, workability is improved when the circuit board 63 is engaged with the wall portion 52b. The number of the upper portions of the divided wall portions 52b is the same as that of the terminal pins 55, so that the width of each wall portion 52b in the circumferential direction can be sufficiently secured.

端子ピン55を回路基板63に半田付けした後、回路基板63の上面は、防湿性を有するコーティング層65で被覆される(図6参照)。このとき、半田部64の上面もコーティング65で被覆される。コーティング層65は、液状のコーティング剤を塗布した後、乾燥して形成される。なお、コーティング剤は、防湿性以外に、電磁波遮断性等の他の物性を有するものを用いてもよい。 After soldering the terminal pins 55 to the circuit board 63, the upper surface of the circuit board 63 is coated with a moisture-proof coating layer 65 (see FIG. 6). At this time, the upper surface of the solder portion 64 is also covered with the coating 65 . The coating layer 65 is formed by applying a liquid coating agent and then drying it. In addition, the coating agent may have other physical properties such as electromagnetic shielding properties in addition to moisture resistance.

壁部52bは、半田部64と径方向に対向し、壁部52bの周方向の幅が、半田部64の周方向の幅よりも大きい。また、壁部52bの上端が、回路基板63の上面よりも軸方向上方に位置する。これにより、回路基板63上面に液状のコーティング剤を塗布する際に、コーティング剤が、壁部52bに遮られて挿入孔63aに流入し難い。このため、コーティング剤が、ステータコア51の挿通孔51aの内周面に付着することを防止できる。従って、ステータ50に軸受ハウジング61を固定する際に、ステータ50に対する軸受ハウジング61の傾きを防止できる。さらに、軸受ハウジング61に保持されるシャフト32の傾斜または偏心を防止できる。すなわち、回路基板63からステータコア51の径方向内面へのコーティング剤の流入を抑制し、モータ1のモータ軸の位置精度を向上することができる。 The wall portion 52 b faces the solder portion 64 in the radial direction, and the width of the wall portion 52 b in the circumferential direction is greater than the width of the solder portion 64 in the circumferential direction. In addition, the upper end of the wall portion 52b is located above the upper surface of the circuit board 63 in the axial direction. Accordingly, when a liquid coating agent is applied to the upper surface of the circuit board 63, the coating agent is blocked by the wall portion 52b and is less likely to flow into the insertion hole 63a. Therefore, the coating agent can be prevented from adhering to the inner peripheral surface of the insertion hole 51 a of the stator core 51 . Therefore, when the bearing housing 61 is fixed to the stator 50 , tilting of the bearing housing 61 with respect to the stator 50 can be prevented. Furthermore, tilting or eccentricity of the shaft 32 held in the bearing housing 61 can be prevented. That is, the inflow of the coating agent from the circuit board 63 to the radial inner surface of the stator core 51 can be suppressed, and the positional accuracy of the motor shaft of the motor 1 can be improved.

なお、コーティング剤は、一定の流動性を有する。半田部64は、回路基板63の上面より上方に突出している。このため、半田部64上に塗布されたコーティング剤は、半田部64の中心から離れる方向に流れる。従って、半田部64の周部を覆うコーティング層65の厚みは、半田部64の中心部を覆うコーティング層65の厚みよりも厚い。より詳細に述べると、半田部64の周部を覆うコーティング層65の軸方向の厚みは、半田部64の中心部を覆うコーティング層65の軸方向の厚みよりも厚い。 In addition, the coating agent has a certain fluidity. The solder portion 64 protrudes upward from the upper surface of the circuit board 63 . Therefore, the coating agent applied on the solder portion 64 flows away from the center of the solder portion 64 . Therefore, the thickness of the coating layer 65 covering the peripheral portion of the solder portion 64 is thicker than the thickness of the coating layer 65 covering the central portion of the solder portion 64 . More specifically, the axial thickness of the coating layer 65 covering the peripheral portion of the solder portion 64 is greater than the axial thickness of the coating layer 65 covering the central portion of the solder portion 64 .

また、回路基板63は、挿入孔63aにおいて径方向内面から径方向内方に突出する基板凸部63cを少なくとも1箇所有する(図3参照)。基板凸部63cは、切欠き部52fと径方向に嵌合し、他の切欠き部52gよりも周方向の幅が大きい。これにより、回路基板63をステータ50に対して周方向に容易に位置決めできる。また、基板凸部63cが、回路基板63に設けられることにより、回路基板63の面積を広くして回路パターンを形成し易くできる。 Further, the circuit board 63 has at least one board convex portion 63c protruding radially inward from the radial inner surface of the insertion hole 63a (see FIG. 3). The substrate convex portion 63c is radially fitted with the notch portion 52f and has a larger width in the circumferential direction than the other notch portion 52g. Thereby, the circuit board 63 can be easily positioned with respect to the stator 50 in the circumferential direction. Further, by providing the board protrusions 63c on the circuit board 63, the area of the circuit board 63 can be increased to facilitate the formation of the circuit pattern.

また、基板凸部63cの径方向内端は、壁部52bの径方向内面に対して径方向の同じ位置または外側に配置される。このため、基板凸部63cの突出量が小さくなり、基板凸部63cの径方向内端部が、挿通孔51から径方向に遠ざかる。すなわち、コーティング剤の軸方向落下地点が、ステータ50の内周面から径方向外側に離れる。これにより、コーティング剤が、ステータコア51の内周面に付着することを抑制できる。また、基板凸部63cは、切欠き部52fと径方向に嵌合するため、回路基板63をステータ50に対して周方向に容易に位置決めできる。 In addition, the radially inner end of the substrate convex portion 63c is arranged at the same position in the radial direction as or outside the radially inner surface of the wall portion 52b. As a result, the protrusion amount of the substrate protrusion 63c is reduced, and the radially inner end portion of the substrate protrusion 63c moves away from the insertion hole 51 in the radial direction. That is, the axial drop point of the coating agent moves radially outward from the inner peripheral surface of the stator 50 . As a result, the coating agent can be prevented from adhering to the inner peripheral surface of stator core 51 . Further, since the board protrusions 63c are radially fitted into the cutouts 52f, the circuit board 63 can be easily positioned with respect to the stator 50 in the circumferential direction.

また、切欠き部52fの下端は、回路基板63の下面よりも軸方向下方に位置する(図2参照)。これにより、切欠き部52fの下端と基板凸部63cの下面との間に軸方向に隙間が形成される。このため、基板凸部63cが、切欠き部52fの下面に接触することなく切欠き部52fに嵌合する。したがって、インシュレータ52と回路基板63との間で、がたつきが発生することを防止できる。 Also, the lower end of the notch portion 52f is located axially below the lower surface of the circuit board 63 (see FIG. 2). Thereby, a gap is formed in the axial direction between the lower end of the notch 52f and the lower surface of the board protrusion 63c. For this reason, the board|substrate convex part 63c fits in the notch part 52f, without contacting the lower surface of the notch part 52f. Therefore, it is possible to prevent rattling between the insulator 52 and the circuit board 63 .

(4.ステータと軸受ハウジングの接続構造)
図7は、軸受ハウジング61を下方から視た斜視図である。軸受ハウジング61は、径方向外面から径方向外方に突出した支持部61a及びハウジング凸部61bを有する。支持部61aは、例えば、6箇所設けられ、周方向に等間隔で配置される。
(4. Connection structure between stator and bearing housing)
FIG. 7 is a perspective view of the bearing housing 61 viewed from below. The bearing housing 61 has a support portion 61a and a housing convex portion 61b projecting radially outward from the radial outer surface. The support portions 61a are provided at six locations, for example, and are arranged at regular intervals in the circumferential direction.

軸受ハウジング61は、端子ピン55が回路基板63に半田付けされた状態のステータ50(図3参照)に固定される。このとき、支持部61aの軸方向下面が、コアバック51dの上面と軸方向に接触する。より詳細に述べると、支持部61aの軸方向下面が、インシュレータ52で覆われていないコアバック51dの上面内縁部と接触する(図2参照)。これにより、ステータ50が、軸受ハウジング61に対して軸方向に位置決めされる。 The bearing housing 61 is fixed to the stator 50 (see FIG. 3) with the terminal pins 55 soldered to the circuit board 63 . At this time, the axial lower surface of the support portion 61a contacts the upper surface of the core back 51d in the axial direction. More specifically, the axial lower surface of the support portion 61a contacts the inner edge portion of the upper surface of the core back 51d that is not covered with the insulator 52 (see FIG. 2). Thereby, the stator 50 is axially positioned with respect to the bearing housing 61 .

また、軸受ハウジング61が、ステータ50に固定された状態において、支持部61aの径方向外面は、壁部52bの径方向内面と少なくとも一部が接触する。これにより、壁部52bが支持部61aにより径方向に支持される。このため、壁部52bが径方向内側に傾倒することが防止される。従って、壁部52bの径方向外面と、回路基板63の挿入孔63aの径方向内面との間に隙間が形成され難く、この隙間にコーティング剤が流入することを防止できる。 Further, when the bearing housing 61 is fixed to the stator 50, the radially outer surface of the support portion 61a is at least partially in contact with the radially inner surface of the wall portion 52b. Thereby, the wall portion 52b is radially supported by the support portion 61a. Therefore, the wall portion 52b is prevented from tilting radially inward. Therefore, a gap is less likely to be formed between the radially outer surface of the wall portion 52b and the radially inner surface of the insertion hole 63a of the circuit board 63, and the coating agent can be prevented from flowing into this gap.

ハウジング凸部61bは、隣接する支持部61a間の例えば、1箇所に設けられる。また、コアバック51dは、ティース51eの径方向内方に位置し、コアバック51dの径方向内面から径方向外方に窪むステータ凹部51bを有する(図3参照)。ハウジング凸部61bは、ステータ凹部51bと径方向に嵌合する。これにより、ステータ50が、軸受ハウジング61に対して周方向に容易に位置決めされる。 The housing convex portion 61b is provided, for example, at one location between the adjacent support portions 61a. The core back 51d has a stator recess 51b located radially inward of the teeth 51e and recessed radially outward from the radial inner surface of the core back 51d (see FIG. 3). The housing convex portion 61b is radially fitted with the stator concave portion 51b. Thereby, the stator 50 is easily positioned in the circumferential direction with respect to the bearing housing 61 .

なお、ステータ凹部51bは、少なくとも1箇所設けられ、ティース51eの径方向の延長上に配置される。具体的には、ステータ凹部51bは、上面視において、ティース51eの周方向の両側辺から径方向に延びる一対の延長線の内側に配置される。これにより、コアバック51d上の周方向に形成される磁路が、ステータ凹部51bによって狭まることを低減できる。 At least one stator concave portion 51b is provided and arranged on the extension of the teeth 51e in the radial direction. Specifically, the stator concave portion 51b is arranged inside a pair of extension lines radially extending from both sides of the teeth 51e in the circumferential direction when viewed from above. As a result, narrowing of the magnetic path formed in the circumferential direction on the core back 51d by the stator recess 51b can be reduced.

<第2実施形態>
次に、本発明の第2実施形態について説明する。図8は第2実施形態の静止部40の斜視図であり、軸受ハウジング61が、ステータ50に固定される前の状態を示す。説明の便宜上、前述の図1~図7に示す第1実施形態と同様の部分には同一の符号を付す。第2実施形態では切欠き部52fの代わりにインシュレータ凹部52iが設けられる。
<Second embodiment>
Next, a second embodiment of the invention will be described. FIG. 8 is a perspective view of the stationary portion 40 of the second embodiment, showing a state before the bearing housing 61 is fixed to the stator 50. FIG. For convenience of explanation, the same reference numerals are given to the same parts as in the first embodiment shown in FIGS. 1 to 7 described above. In the second embodiment, an insulator concave portion 52i is provided instead of the notch portion 52f.

インシュレータ凹部52iは、壁部52bの径方向外面に形成され、径方向内方に窪む。基板凸部63cが、インシュレータ凹部52iに嵌合した際に、基板凸部63cの径方向内端部は、壁部52bと径方向に対向する。これにより、基板凸部63cの上面から挿通孔51aにコーティング剤が流入することを防止できる。 The insulator recessed portion 52i is formed on the radial outer surface of the wall portion 52b and recessed radially inward. When the substrate convex portion 63c is fitted into the insulator concave portion 52i, the radially inner end portion of the substrate convex portion 63c faces the wall portion 52b in the radial direction. This can prevent the coating agent from flowing into the insertion hole 51a from the upper surface of the substrate protrusion 63c.

(5.その他)
上記実施形態は、本発明の例示にすぎない。実施形態の構成は、本発明の技術的思想を超えない範囲で適宜変更されてもよい。また、実施形態は、可能な範囲で組み合わせて実施されてよい。
(5. Others)
The above embodiments are merely examples of the present invention. The configuration of the embodiment may be changed as appropriate without departing from the technical idea of the present invention. Also, the embodiments may be implemented in combination within a possible range.

本発明のモータは、例えば、車載用の冷却用送風機に利用することができる。 The motor of the present invention can be used, for example, as an in-vehicle cooling fan.

1 モータ
10 インペラ
11 カップ部
12 羽根
30 回転部
31 ロータホルダ
32 シャフト
32c 下面カバー部
33 マグネット
40 静止部
50 ステータ
51 ステータコア
51a 挿通孔
51b ステータ凹部
51d コアバック
51e ティース
52、53 インシュレータ
52a 基台部
52b 壁部
52c 上面カバー部
52d 側面カバー部
52e 突起部
52f 切欠き部
52g 切込み部
52h 端子案内部
52i インシュレータ凹部
55 端子ピン
61 軸受ハウジング
61a 支持部
61b ハウジング凸部
63 回路基板
63a 挿入孔
63b 貫通孔
63c 基板凸部
64 半田部
65 コーティング層
80 軸受部
100 送風機
C 中心軸
1 Motor 10 Impeller 11 Cup Part 12 Blade 30 Rotating Part 31 Rotor Holder 32 Shaft 32c Lower Cover Part 33 Magnet 40 Stationary Part 50 Stator 51 Stator Core 51a Insertion Hole 51b Stator Concave Part 51d Core Back 51e Teeth 52, 53 Insulator 52a Base Part 52b Wall Part 52c Top cover part 52d Side cover part 52e Projection part 52f Notch part 52g Notch part 52h Terminal guide part 52i Insulator concave part 55 Terminal pin 61 Bearing housing 61a Support part 61b Housing convex part 63 Circuit board 63a Insertion hole 63b Through hole 63c Board Convex portion 64 Solder portion 65 Coating layer 80 Bearing portion 100 Air blower C Central shaft

Claims (10)

静止部と、
上下に延びる中心軸を中心として回転するシャフトを有する回転部と、
前記静止部に対して前記シャフトを回転可能に支持する軸受部と、
を備え、
前記静止部は、
前記軸受部を保持する筒状の軸受ハウジングと、
前記軸受ハウジングの径方向外方に配置されるステータと、
前記ステータの上方に配置され、前記軸受ハウジングを挿入する挿入孔を有する回路基板と、
を備え、
前記ステータは、
環状のコアバックと、前記コアバックから径方向外方に延びて周方向に複数配置されるティースと、を有するステータコアと、
前記ステータコアの少なくとも一部を覆うインシュレータと、
前記ティースの周囲に前記インシュレータを介して導線を巻回したコイルと、
前記導線と接続され、前記回路基板に形成された貫通孔を貫通して前記回路基板よりも上方に突出し、前記回路基板にコーティング層で被覆された半田部を介して接続される端子ピンと、
を備え、
前記インシュレータは、
前記ステータコアの上方の少なくとも一部を覆う基台部と、
前記基台部から上方に突出し、前記軸受ハウジングの径方向外方に配置され、前記挿入孔において前記回路基板の径方向内面に接触する壁部と、
を有し、
前記壁部は、前記半田部と径方向に対向し、
前記壁部の周方向の幅が、前記半田部の周方向の幅よりも大きく、
前記壁部の上端が、前記回路基板の上面よりも軸方向上方に位置
前記回路基板は、前記挿入孔において径方向内面から径方向内方に突出する基板凸部を有し、
前記壁部は、軸方向下方に窪む切欠き部を有し、
前記基板凸部は、前記切欠き部と嵌合し、
前記基板凸部の径方向内端は、前記壁部の径方向内面に対して径方向外方に配置される、モータ。
a stationary part;
a rotating part having a shaft that rotates around a vertically extending central axis;
a bearing portion that rotatably supports the shaft with respect to the stationary portion;
with
The stationary part is
a cylindrical bearing housing that holds the bearing;
a stator disposed radially outward of the bearing housing;
a circuit board disposed above the stator and having an insertion hole into which the bearing housing is inserted;
with
The stator is
a stator core having an annular core back and a plurality of teeth extending radially outward from the core back and arranged in a circumferential direction;
an insulator covering at least a portion of the stator core;
a coil in which a conductive wire is wound around the teeth via the insulator;
a terminal pin connected to the conducting wire, penetrating through a through hole formed in the circuit board, protruding above the circuit board, and connected to the circuit board via a solder portion covered with a coating layer;
with
The insulator is
a base portion covering at least a portion above the stator core;
a wall portion that protrudes upward from the base portion, is arranged radially outward of the bearing housing, and contacts the radial inner surface of the circuit board in the insertion hole;
has
The wall portion faces the solder portion in a radial direction,
the circumferential width of the wall portion is greater than the circumferential width of the solder portion;
the upper end of the wall portion is positioned axially above the upper surface of the circuit board;
The circuit board has a board protrusion projecting radially inward from a radial inner surface of the insertion hole,
The wall portion has a notch portion recessed downward in the axial direction,
The board convex portion is fitted with the notch portion,
The motor , wherein the radially inner end of the board convex portion is arranged radially outward with respect to the radially inner surface of the wall portion .
前記切欠き部の下端は、前記回路基板の下面よりも軸方向下方に位置する、請求項に記載のモータ。
2. The motor according to claim 1 , wherein a lower end of said notch portion is located axially below a lower surface of said circuit board.
静止部と、
上下に延びる中心軸を中心として回転するシャフトを有する回転部と、
前記静止部に対して前記シャフトを回転可能に支持する軸受部と、
を備え、
前記静止部は、
前記軸受部を保持する筒状の軸受ハウジングと、
前記軸受ハウジングの径方向外方に配置されるステータと、
前記ステータの上方に配置され、前記軸受ハウジングを挿入する挿入孔を有する回路基板と、
を備え、
前記ステータは、
環状のコアバックと、前記コアバックから径方向外方に延びて周方向に複数配置されるティースと、を有するステータコアと、
前記ステータコアの少なくとも一部を覆うインシュレータと、
前記ティースの周囲に前記インシュレータを介して導線を巻回したコイルと、
前記導線と接続され、前記回路基板に形成された貫通孔を貫通して前記回路基板よりも上方に突出し、前記回路基板にコーティング層で被覆された半田部を介して接続される端子ピンと、
を備え、
前記インシュレータは、
前記ステータコアの上方の少なくとも一部を覆う基台部と、
前記基台部から上方に突出し、前記軸受ハウジングの径方向外方に配置され、前記挿入孔において前記回路基板の径方向内面に接触する壁部と、
を有し、
前記壁部は、前記半田部と径方向に対向し、
前記壁部の周方向の幅が、前記半田部の周方向の幅よりも大きく、
前記壁部の上端が、前記回路基板の上面よりも軸方向上方に位置し、
前記回路基板は、前記挿入孔において径方向内面から径方向内方に突出する基板凸部を有し、
前記壁部は、径方向外面に形成され、径方向内方に窪むインシュレータ凹部を有し、
前記基板凸部は、前記インシュレータ凹部と嵌合
前記基板凸部の径方向内端部は、前記壁部と径方向に対向する、モータ。
a stationary part;
a rotating part having a shaft that rotates around a vertically extending central axis;
a bearing portion that rotatably supports the shaft with respect to the stationary portion;
with
The stationary part is
a cylindrical bearing housing that holds the bearing;
a stator disposed radially outward of the bearing housing;
a circuit board disposed above the stator and having an insertion hole into which the bearing housing is inserted;
with
The stator is
a stator core having an annular core back and a plurality of teeth extending radially outward from the core back and arranged in a circumferential direction;
an insulator covering at least a portion of the stator core;
a coil in which a conductive wire is wound around the teeth via the insulator;
a terminal pin connected to the conducting wire, penetrating through a through hole formed in the circuit board, protruding above the circuit board, and connected to the circuit board via a solder portion covered with a coating layer;
with
The insulator is
a base portion covering at least a portion above the stator core;
a wall portion that protrudes upward from the base portion, is arranged radially outward of the bearing housing, and contacts the radial inner surface of the circuit board in the insertion hole;
has
The wall portion faces the solder portion in a radial direction,
the circumferential width of the wall portion is greater than the circumferential width of the solder portion;
the upper end of the wall portion is positioned axially above the upper surface of the circuit board;
The circuit board has a board protrusion projecting radially inward from a radial inner surface of the insertion hole,
the wall portion has an insulator recess formed on a radially outer surface and recessed radially inward;
The board protrusions are fitted with the insulator recesses,
The motor , wherein a radially inner end portion of the board convex portion faces the wall portion in a radial direction .
前記半田部の周部を覆う前記コーティング層の軸方向の厚みは、前記半田部の中心部を覆う前記コーティング層の軸方向の厚みよりも厚い、請求項1~請求項のいずれかに記載のモータ。
The axial thickness of the coating layer covering the peripheral portion of the solder portion is thicker than the axial thickness of the coating layer covering the central portion of the solder portion. motor.
前記軸受ハウジングは、径方向外面から径方向外方に突出した支持部を有し、
前記支持部の軸方向下面は、前記コアバックの上面と軸方向に接触する、請求項1~請求項のいずれかに記載のモータ。
The bearing housing has a support portion protruding radially outward from a radial outer surface,
The motor according to any one of claims 1 to 4 , wherein the axial lower surface of the support portion axially contacts the upper surface of the core back.
前記支持部の径方向外面は、前記壁部の径方向内面と接触する、請求項に記載のモータ。
6. The motor of claim 5 , wherein the radially outer surface of the support portion contacts the radially inner surface of the wall portion.
前記軸受ハウジングは、径方向外面から径方向外方に突出するハウジング凸部を有し、
前記コアバックは、前記ティースの径方向内方に位置し、前記コアバックの径方向内面から径方向外方に窪むステータ凹部を有し、
前記ハウジング凸部は、前記ステータ凹部と嵌合する、請求項1~請求項のいずれかに記載のモータ。
The bearing housing has a housing protrusion projecting radially outward from a radial outer surface,
The core back has a stator concave portion positioned radially inward of the teeth and recessed radially outward from the radial inner surface of the core back,
7. The motor according to any one of claims 1 to 6 , wherein said housing protrusions are fitted with said stator recesses.
前記壁部の上部が、前記端子ピンと同数で周方向に分割される、請求項1~請求項のいずれかに記載のモータ。
The motor according to any one of claims 1 to 7 , wherein the upper portion of the wall portion is divided in the same number as the terminal pins in the circumferential direction.
前記端子ピンは、隣接する前記ティース間に配置される、請求項1~請求項のいずれかに記載のモータ。
The motor according to any one of claims 1 to 8 , wherein the terminal pins are arranged between the adjacent teeth.
請求項1~請求項のいずれかに記載のモータと、前記シャフトに固定されて中心軸周りに回転するインペラと、を備える送風機。
A fan comprising: the motor according to any one of claims 1 to 9 ; and an impeller fixed to the shaft and rotating around a central axis.
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